ViewPager Cards

CardPagerTransformerBasic.java

public class CardsPagerTransformerBasic implements ViewPager.PageTransformer {
  
  private int baseElevation;
  private int raisingElevation;
  private float smallerScale;
  
  public CardsPagerTransformerBasic(int baseElevation, int raisingElevation, float smallerScale) {
    this.baseElevation = baseElevation;
    this.raisingElevation = raisingElevation;
    this.smallerScale = smallerScale;
  }
  
  @Override
  public void transformPage(View page, float position) {
    float absPosition = Math.abs(position);
    
    if (absPosition >= 1) {
      page.setElevation(baseElevation);
      page.setScaleY(smallerScale);
    } else {
      // This will be during transformation
      page.setElevation(((1 - absPosition) * raisingElevation + baseElevation));
      page.setScaleY((smallerScale - 1) * absPosition + 1);
    }
  }
  
}

CardPagerTransformerShift.java

public class CardsPagerTransformerShift implements ViewPager.PageTransformer {
  
  private int baseElevation;
  private int raisingElevation;
  private float smallerScale;
  private float startOffset;
  
  public CardsPagerTransformerShift(int baseElevation, int raisingElevation, float smallerScale, float startOffset) {
    this.baseElevation = baseElevation;
    this.raisingElevation = raisingElevation;
    this.smallerScale = smallerScale;
    this.startOffset = startOffset;
  }
  
  @Override
  public void transformPage(View page, float position) {
    float absPosition = Math.abs(position - startOffset);
    
    if (absPosition >= 1) {
      page.setElevation(baseElevation);
      page.setScaleY(smallerScale);
    } else {
      // This will be during transformation
      page.setElevation(((1 - absPosition) * raisingElevation + baseElevation));
      page.setScaleY((smallerScale - 1) * absPosition + 1);
    }
  }
  
}

how to use this code?